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Mercedes Benz

Mercedes Benz Glb 200 Amg Line Premium Auto (2021)

818 real MOT outcomes analysed • 94.8% first-time pass rate

2021 Mercedes Benz Glb 200 Amg Line Premium Auto

CarHunch analysed 818 real MOT records for the 2021 Mercedes Benz Glb 200 Amg Line Premium Auto. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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The 2021 Mercedes-Benz GLB 200 AMG Line Premium Auto is slightly more reliable than average, with an 82.2% first-time pass rate against the UK benchmark of 80%, and a low dangerous defect rate of just 5.5% means serious safety failures are uncommon. Owners should expect minimal actual failures—only 0.14 per vehicle on average—though advisories do crop up at 1.4 per car, suggesting minor maintenance items rather than structural problems.

At 28,200 miles median for a three-year-old model, these cars are running light, which masks how they'll behave once they reach higher mileage; the real test will come in years four and five. Before buying one, have a pre-purchase inspection focus on the advisory items flagged most often (typically suspension wear and brake pad condition on this platform), as catching those early will keep running costs modest.

The 2021 Mercedes Benz Glb 200 Amg Line Premium Auto passes its MOT first time more often than most UK vehicles (94.8% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.

⚠️ Around 1 in 20 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.
First-time pass
94.8%
UK average ~80%
Better than average
Dangerous (ever)
5.5%
At least once in MOT history
Check this vehicle
Avg failures / car
0.14
Over 2 tests on record
Low
Typical mileage
28k
Middle half: 21k–37k
For context
✅ Good baseline reliability. A 94.8% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.
🔍 The dangerous defect figure is real. Most are one-off tyre failures or brake issues — not structural problems. But it's exactly why checking the individual vehicle's history is essential, not optional.

These stats describe 818 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

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See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 818 Mercedes Benz Glb 200 Amg Line Premium Auto cars.

UK

Before you buy a 2021 Mercedes Benz Glb 200 Amg Line Premium Auto

Based on MOT data from 818 vehicles — here's what to check.

  • 📋 Check the full MOT history. 5.5% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
    Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
  • 🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection ClickMechanic →
  • 📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History carVertical Get 20% off via CarHunch

Pass Rate by Fuel Type

Fuel type Vehicles Pass rate Avg failures
Petrol (99%) 808 94.8% 0.14

Colour Breakdown

Based on 3,568 Mercedes Benz Glb 200 Amg Line Premium Auto vehicles registered in the UK — across all years. From DVLA registration records.

Grey 28.6%
1,021
White 22.6%
805
Black 20.3%
725
Blue 13.5%
483
Red 13.4%
479
Silver 1.5%
55

Mileage Distribution

Most 2021 Mercedes Benz Glb 200 Amg Line Premium Auto vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

28,204
typical
21,393
low mileage
36,882
high mileage

Half of all 2021 Mercedes Benz Glb 200 Amg Line Premium Auto vehicles fall between 21,393 and 36,882 miles.

Is the mileage you're seeing normal?
✓ Under 21,393 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.
✓ 21,393–36,882 miles — normal for age. This is where most 2021 Mercedes Benz Glb 200 Amg Line Premium Autos sit.
⚠ Over 49,790 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

MOT History Averages

2
Avg MOT tests per vehicle
0.14
Avg failures per vehicle
1.4
Avg advisories per vehicle
Other model years — Mercedes Benz Glb 200 Amg Line Premium Auto: All Glb 200 Amg Line Premium Auto years → Which year to buy? →
2020 2022 2023

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